CODEWITHSUNDEEP
python
dajl
dajl

Reputation: 33

Python Maths Issue

I am average at python and not even that at maths.

The equation y = 122.32e-0.31x can be used to calculate how much faster your web page load is compared to other. So a site that loads in 5 seconds is faster than 25% of websites.

Y is the percentage faster and x is the page load in seconds.

This data was found here - http://www.seomoz.org/blog/site-speed-are-you-fast-does-it-matter

To convert this in to python I have tried the following :

import math
# y = 122.32e-0.31x
y = (122.32*math.e)**(-0.31 * page_load_time)

Doesn't seem to be right. Can anyone correct the code?

Upvotes: 0

Views: 150

Answers (2)

asheeshr
asheeshr

Reputation: 4114

The equation is y = 122.32e-0.31x

In python, it will be :

y = 122.32*math.e**(-0.31*x)

I did some time measurements : 

>>> t = timeit.Timer('for i in l : e**i', setup = 'from math import e; l = range(10,50)')
>>> t.timeit()
23.76981210708618
>>> t2 = timeit.Timer('for i in l : exp(i)', setup = 'from math import exp; l = range(10,50)')
>>> t2.timeit()
13.754070043563843
>>> t.timeit()
23.382396936416626
>>> t2.timeit()
13.842521905899048

It appears that the implementations of both the methods are different and that math.exp, as mentioned by @MrDave, is faster than math.e

Upvotes: 2

Dvx
Dvx

Reputation: 279

import math
y = 122.32*math.exp(-0.31*page_load_time)

should do what you want

Upvotes: 3

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